Features:Ultra-thin designEasy to installFast Heat dissipationSmooth and straight aluminum materialAll ports and slots of the case can match with Raspberry Pi 4 Computer Model B perfectlyOpen case design, you don't need to worry it will effect wifi signal any moreReinforced aluminum material, lightweight and durable, long-lasting stainlesWe use silicon cooling pad (the thickness is only 0.5mm) to Contact the shell body to dissipate heat. You can use the CPU grease to relace the silicon colling pad to get better heat dissipation.Note: The Raspberry Pi board is not includedColour: BlackMaterial: aluminum alloyPackage Contents:5 x for Raspberry Pi 4 Model B Aluminum CaseOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.